Q: Is 3,957,421 a Prime Number?
A: No, 3,957,421 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3957421 can be evenly divided by 1 13 304,417 and 3,957,421, with no remainder.
Since 3,957,421 cannot be divided by just 1 and 3,957,421, it is not a prime number.